The first line of every PDF document is a file header with the characters “%PDF-“ followed by a version number, shown as “1.n,” where “n” would be a digit from 0 to 7. So the first line of a PDF document might look like this: %PDF-1.7 The... Read More

Optional Content is a feature that permits content to be made visible or invisible, based on switch set when being viewed in Adobe Acrobat or other viewing tool. Optional Content, or “layers,” are a useful way to present information when opening... Read More

A PDF document may contain thumbnail images, but they are not required. Adobe Acrobat ignores any thumbnails it finds in a PDF, and automatically generates its own temporarily when they are needed for page viewing. It does not embed its own... Read More

Suppose you want to create only a cyan or magenta color separation from an image in a PDF document. PDPageMakeSeparations() will provide PostScript separations. Datalogics offers several sample programs that demonstrate working with color separations... Read More

This error usually appears when the expiration date has passed for the link used to download an eBook from Adobe Content Server. In a normal workflow, an .acsm file is generated for a book that is used as the link to download the actual book. This... Read More

Problem / Error Solution(s) / Info java.lang.Error: Problem reading key and certificate from keystore Password in fulfillment.conf may be incorrect (including extra white space) p12 (certificate) may be corrupted E_LSGN_NO_CERTIFICATE and... Read More

If you have an update for a book that is packaged in Adobe Content Server, or you want to change metadata, such as the title or description, or want to re-package for any other reason, you can use the replace feature in the package process. This will... Read More

If you are an Adobe Content Server administrator that needs to change the fulfillment URL of your ACS installation, perhaps because you may be moving ACS to the cloud, please be aware that there are additional steps to be taken to do so... Read More

With the introduction of Java 7u141 and 8u131, Oracle decided that it was time to disable MD5 signatures. While everyone can agree that this was a good decision, it does cause some havoc with software that still uses MD5 signed JAR files. Adobe... Read More